Local Calling Guide
Area code/prefix search
NPA: 857
[Rate centres in NPA 857]
[Dial plan for NPA 857]
NXX: 757
| NPA-NXX |
BLOCK |
Rate Centre |
Region |
Switch |
OCN |
LATA |
LIR |
Eff date |
Disc date |
| 857-757
| A |
Cambridge |
MA |
|
507J THE VOICE APPLICATION NETWORK, LLC |
128 |
|
2025-04-21 |
|
| 857-757
| 0 |
Cambridge |
MA |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
128 |
|
2022-05-20 |
|
| 857-757
| 1 |
Cambridge |
MA |
|
507J THE VOICE APPLICATION NETWORK, LLC |
128 |
|
2015-06-02 |
|
| 857-757
| 2 |
Cambridge |
MA |
|
732H BARR TELL USA, INC. - MA |
128 |
|
2015-12-31 |
|
| 857-757
| 3 |
Cambridge |
MA |
|
892D ONVOY, LLC - MA |
128 |
|
2021-12-06 |
|
| 857-757
| 4 |
Cambridge |
MA |
|
508J CENTURYLINK COMMUNICATIONS, LLC |
128 |
|
2018-02-22 |
|
| 857-757
| 5 |
Cambridge |
MA |
|
508J CENTURYLINK COMMUNICATIONS, LLC |
128 |
|
2018-02-22 |
|
| 857-757
| 6 |
Cambridge |
MA |
|
508J CENTURYLINK COMMUNICATIONS, LLC |
128 |
|
2018-02-22 |
|
| 857-757
| 7 |
Cambridge |
MA |
|
508J CENTURYLINK COMMUNICATIONS, LLC |
128 |
|
2018-02-22 |
|
| 857-757
| 8 |
Cambridge |
MA |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
128 |
|
2018-12-20 |
|
| 857-757
| 9 |
Cambridge |
MA |
|
6889 OMNIPOINT MIAMI E LICENSE, LLC |
128 |
|
2018-12-20 |
|
Last updated: Thu, 01 Jan 2026 03:59:49 UTC
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